Don't worry folks, we're a long time away from actually being able to redesign much of anything. Between Liljim and myself we already have over a years worth of higher priority projects to tackle with new things piling up every day.
That said, when we do work on a new design, it will be a phased deployment and very tightly managed. We'd basically start by coming up with whatever new colors and menu styles we want to use, any new header footer stuff that can just swap with what's on the layouts now. Then we would work on any other graphical changes like icons or whatever, then we would slowly start rebuilding the actual layouts section by section by priority so they would be friendlier to more devices.
We learned the hard way during the last two redesigns that you just can't do everything and go.
None of the leaked designs are approved or final by any means and by the time we're ready to roll on anything, may look COMPLETELY different. But your critiques on these concepts may definitely be considered in the design choices we ultimately make. So, as Tom said, feel free to critique!